Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
tu sach » thu sach, su sach, te sach
duc cac » duoc cac, tuc cac, muc cac
dao dai » dat dai, dao dan, tao dai
y nang » ky nang, ly nang, may nang
v nang » va nang, vu nang, van nang
va cam » va cham, va cac, va cao
duc ca » duc va, duc ha

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((y nang) OR (v nang)) xa hoi. lieu va cam ((duc ca) OR (duc cac)) dao dai cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((y nang) or (v nang)) xa hoi. lieu va cam ((duc ca) OR (duc cac)) dao dai cua triet~".
• Adding a wildcard symbol may retrieve word variants: tu sach ((y nang) or (v nang)) xa hoi. lieu va cam ((duc ca) OR (duc cac)) dao dai cua triet*.